Quote:
Originally Posted by LittleHoov
....<snip>The down side is that you would have to run your own 12v wiring to each relay, either that or find a suitable constant power source nearby. Then mount the relay somewhere and run wires to each headlamp. Plus run a ground for each relay. There might also be some delay in the blinking. Plus I would think it might be hard on the relays to switch on and off rapidly like that. But Im far from an electronics expert.
|
Everything can be done right up at each headlight as the power source is what is applied to the turn signal bulb. Perhaps the relay could even go inside the light assembly. As I failed to explain clearly previously
, One side of the bulb is grounded and the bcm hits the other side of the bulb with 12 volts. So, then connecting a relay parallel to each bulb will activate the relay when signal light.... signals.
A typical relay "pulls in" in around 10-15 milliseconds (thousandths of a second) and drops out in less than 10 milliseconds, so turning on and off for a least 1/2 intervals is no problem at all. Not much different than the clicking relay in the hazard switch.
As for the load. The steady state current for the 3156 cornering light is 2.1 amps. Say double that when hitting a cold filament and then any relay rated at current of 5 amp
DC would be fine. Automotive relays tend to be 10 to 20 amp depending on the application.
The parking light marker lights, either 158s or 194s are like around 1/4 amp. But they need to be on at night and are off(no power) in the day so a different logic circuit would be required than the earlier idea above that just switches the always present 12V when signaling at the cornering lights.
cheers